There was a severe lack of awesome female fronted rock songs in Rock Band for a long time, because I'm a sucker for beautiful female voices like e.g. Yeah Yeah Yeah's Karen O's, and RBN fills this gap now:
Let's recommend some awesome RBN releases which deserve some love:
Rose of Jericho "Buried Cold":
Very cool power ballad, sounds like a mixture of Evanescence & that amazing Six Feet Under song by Sia ("Breathe Me").
Awesome on drums, too.
Pollyn "Gave It Up":
Similar to Maps by YYYs, but with a less complex beat. Very laid-back tune, awesome for a trippy mood at the late night
Steve and Lindley Band "Backyard Buildyard":
That Steve in the band name might be pretty misleading, but if you like unique indie rock, then don't miss out on this one.
All of those are up in the RBN store for only 80 MSP
Got more recommendations? Me likey.